The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2004
Filed:
Nov. 07, 2001
Applicant:
Inventor:
Shoji Hirata, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 5/00 ;
U.S. Cl.
CPC ...
H01S 5/00 ;
Abstract
The present invention provides a semiconductor laser including a plurality of light emission portions provided on the same substrate, each of which is adapted to emit laser beams with a multi-mode. A part of the plurality of light emission portions constitute a main light emission group, and the rest of the plurality of light emission portions constitute a sub-light emission group. A main electrode for supplying a current to the main light emission group and a sub-electrode for supplying a current to the sub-light emission group are separately provided. With this configuration, it is possible to keep the entire quality of laser beams of the semiconductor laser constant.